I don’t know if you’ve noticed this, but the average age of programmers these days is just slightly above “right out of undergrad”.
If you wait for the senior people to interview everyone, you’re going to be waiting a while.
”Coding questions are among the most quantifiable and objective questions there are.”
Bullshit. Coding questions feel objective, and programmers love to pretend they’re objective, but like any other human evaluation process, they’re subjective. It’s not like you automatically get the job if you get the answer right.
Unless you’re verifying that your team is generating consistent, reproducible outcomes, I can pretty much guarantee that they’re not.